uni-app项目打包报这个错，怎么解，求教

本来的项目可以运行，可以打包，更新一次HbuilderX版本后就报下面的错，不知道是什么原因，可能是更新的问题，也可能是别的问题，有没有大佬遇到过类似的问题，求指教。

[HBuilder] 10:05:55.727 项目 'bang' 编译成功.
[HBuilder] 10:05:55.735 SyntaxError: Unexpected token s in JSON at position 116
[HBuilder] 10:05:55.735 at JSON.parse (<anonymous>)
[HBuilder] 10:05:55.742 at parseConfig (D:\GCY-program\HBuilderX\plugins\weapp-tools\lib\index.js:1:5457)
[HBuilder] 10:05:55.744 at index (D:\GCY-program\HBuilderX\plugins\weapp-tools\lib\index.js:1:15980)
[HBuilder] 10:05:55.755 at Promise (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-hbuilderx\packages\webpack-app-plus-plugin\index.js:103:13)
[HBuilder] 10:05:55.757 at new Promise (<anonymous>)
[HBuilder] 10:05:55.764 at compiler.hooks.done.tapPromise.compilation (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-hbuilderx\packages\webpack-app-plus-plugin\index.js:81:16)
[HBuilder] 10:05:55.764 at AsyncSeriesHook.eval [as callAsync] (eval at create (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:17:17)
[HBuilder] 10:05:55.773 at AsyncSeriesHook.lazyCompileHook (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\tapable\lib\Hook.js:154:20)
[HBuilder] 10:05:55.782 at emitRecords.err (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\webpack\lib\Compiler.js:261:22)
[HBuilder] 10:05:55.790 at Compiler.emitRecords (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\webpack\lib\Compiler.js:375:39)
[HBuilder] 10:05:55.791 at emitAssets.err (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\webpack\lib\Compiler.js:255:10)
[HBuilder] 10:05:55.798 at hooks.afterEmit.callAsync.err (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\webpack\lib\Compiler.js:361:14)
[HBuilder] 10:05:55.799 at _err0 (eval at create (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:20:1)
[HBuilder] 10:05:55.809 at callback (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\copy-webpack-plugin\dist\index.js:126:17)
[HBuilder] 10:05:55.817 at afterEmit (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\copy-webpack-plugin\dist\index.js:220:13)
[HBuilder] 10:05:55.818 at AsyncSeriesHook.eval [as callAsync] (eval at create (D:\GCY-program\HBuilderX\plugins\uniapp-cli\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:7:1)
[HBuilder] 10:05:55.827 [ERROR] 读取app.json失败...